1999. Bureau of Transportation Statistics, (comp.). The 106th Congressional District Boundaries data set contains geographic information for the political entities of the Congressional districts of t... Bureau of Transportation Statistics.
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1999. Geological Survey (U.S.) and Environmental Systems Research Institute (Redlands, Calif.). U.S. National Atlas Airports represents airports in the United States, Puerto Rico, and U.S. Virgin Islands with airport passenger enplanements of ... Environmental Systems Research Institute, Inc. (ESRI).
1999. ESRI, Inc. World Named Latitudes and Longitudes contains geographically significant lines of reference such as the equator, tropics, Arctic and Antarctic circ...
1999. American Geological Institute, Geological Survey (U.S.), Petroconsultants International Data Corp., and Environmental Systems Research Institute (Redlands, Calif.). This coverage contains points that describe centerpoint locations of and primary commodity produced by oil and gas fields. A fundamental task in th... American Geological Institute.
1999. Department of Commerce, Census Bureau, Geography Division, Harvard Geospatial Library, and Environmental Systems Research Institute, Inc. (ESRI). U.S. 106th Congressional Districts represents political boundaries for the U.S. 106th Congressional Districts. Environmental Systems Research Institute, Inc. (ESRI).
6. World Lakes
1999. ESRI, Inc. Layer contains major lakes of the world, as well as shorelines. This includes inland seas, for example, the Caspian. Attribute data includes names,...
7. World Rivers
1999. ESRI, Inc. Layer contains major rivers of the world.
8. wwf_eco
1999. World Wildlife Fund. World Wildlife Fund Ecoregions represent 24,944 defined global ecoregions. Ecoregions are defined as relatively large areas of land or water that s...
